How does one climb as a solo support?

I usually play as Moira (been my main since like 2018-2019), but she's been getting banned often lately.

Ana works somewhat well, but divers like Tracer and Reaper make my bunghole hurt.

Baptiste is a powerhouse but my aim is shit since I'm a console pleb. Still, regardless of my own performance I can't outheal my team's stupidity and usually the team with a better tank wins.